.menu{width: 33%;}
@media only screen and (max-width: 768px){
.menu{ width : 50%;}
}
@media only screen and (max-width: 480px) {
.menu{ width : 100%;}
}
http://www.steveperrycreative.com/getting-started-with-sass-and-compass/
.header
h1
..
a
..
.menu
..
a
..
.header {}
.header h1{}
.header h1 a{}
.header .menu{}
.header .menu a{}
.header{
color:red;
h1{
....
a{
..
}
}
}
.header {}
.header h1{}
.header h1 a{}
.header
h1
..
a
..
.menu
..
a
..